Feature Request: Use Lookups in Post-Build Hooks

[Spareo]

I have integrated stacker into a few projects now and have run into the same issue a few times where I want to run a post build hook and need to access the stack outputs. Currently, unless Im doing something wrong, it seems that I can't use the the ${output stackName::outputName} lookup or any other lookup in a post build hook.

I have had to do resort to using boto3 directly in my hook code which I really don't like.

[yinuochen]

I would like this with pre build hooks as well.

[peter-t-kim]

Has there been any updates on this? It seems natural that stacker should support references in build hooks as well.